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Believe that many partners should have the same experience, driving on the highway at night, but can only see the dark around, in addition to the headlights and road reflective signs, basically can not see other lights, people wonder that there is no sense of security. Why are there no street lights on the highway? Is it safer to have street lights? In fact, generally speaking, except for important bridges and tunnels, highways are not equipped with street lights. Now I will give you an analysis of why the highway does not install street lights. Highway safety factor is higher Have you ever seen pedestrians and non-motorized vehicles come and go at night like they do on city streets? No, Because the expressway does not allow pedestrians and non-motor vehicles, motorcycles, tractors, tricycles, and no cars of 80 yards in 15 seconds can not be accessed. Installation of street lights is not for the safety and convenience of vehicles (because the car has headlights), but for the safety and convenience of non-motor vehicles and pedestrians. The service functions of highway and urban road are different. Urban road has not only vehicles, but also non-motorized vehicles and pedestrians, so there are street lights. Highway is an out-of-town road connecting city and city, city and country, with few non-motorized vehicles and pedestrians. Therefore, there are no street lights on expressways in general. In addition, the highway pavement is very flat, there is no obvious pit, the road condition is better, and the safety factor is higher. Pavement Reflective Signs Meet Needs Is it safer and more convenient for drivers to install street lights on expressways? The answer is No. Street lamp lighting is discontinuous and uneven. For drivers of high-speed vehicles, this alternation of light and shade can cause visual errors (illusions), which are very dangerous. In addition, it can quickly cause eye fatigue. And the street lamp illumination is poor, and scattered light, will make long-distance driving drivers dazzling, resulting in driving safety hazards. There are no street lights. What about drivers driving on highways at night? When the outside lighting is insufficient, vehicle headlights can provide safer lighting for drivers. Because there is no obstruction to the car, you can drive at night with a high-light. (This friend who drives must be very experienced.) That's why some drivers like to turn on headlights (high lights) even when they are driving in bright city streets (which, of course, is a bad driving habit). Vehicle driving at night, perfect road signs and reflective signs fully meet the needs. At night, under the intense illumination of automobile headlights, the reflective film on the traffic signs will directionally reflect light, illuminate the road surface, and can clearly reflect various traffic signs to the driver's eyes, which is enough to complete the function of direction guidance. The cost is not low and the management is troublesome. The total mileage of our country's expressway is more than 100,000 kilometers. Installation of street lights in the whole section of the expressway is bound to be a considerable expense. Moreover, the randomness of traffic flow on Expressway lines is too strong. Installation of street lights for a small number of vehicles will inevitably result in a huge waste of energy. In addition, the power supply and management of each section of expressway is also a thorny problem. To sum up, it is not necessarily scientific and energy-saving to install street lights on expressways. Although the safety factor of expressway is high, driving at night still needs to be careful.
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